11 Answered Questions for the topic Optics
How big should a lens of a telescope be so we can see the American flag on the Moon from the Earth's surface?
How big in diameter should the lens of the imaginary telescope to be so we can see the American flag from e.g. some observatory in Hawaii?
Final image through combination of lens and mirror
An illuminated object is placed at right angle to the axis of a converging lens of focal length 15cm and 22.5cm away from it. On the other side of the lens coaxial to it a diverging lens of focal... more
Concave Mirror Problems
The famous Chinese magician Foo Ling Yu performs a classic magic trick using a concave mirror with a focal length of 1.6 m. Foo uses the mirror to produce an image of a light bulb that is the same... more
What is the angle of refraction?
A ray of light traveling through air (refractive index exactly 1.0003) strikes thesurface of a transparent solid (refractive index exactly 2.5) at an incident angle ofexactly 0.7 radians. What is... more
What is the angle θ of the prism?
Here is my diagram: https://i.stack.imgur.com/WYSnE.png A parallel beam of light is incident from air at an angle a on the side PQ of a right angled triangular prism of refractive index n=√2.... more
Focal length question
A converging glass lens (index of refraction 1.63) has a focal length of 40 cm in air. Find its focal length when it is immersed in a liquid, which has an index of refraction 1.32. The way I... more
my question is when does a lens and mirror combination have an i3. cause there are examples in the internet that doesnt have i3 such as https://www.youtube.com/watch?v=aGHnH_4KFRE. and there are... more
Find the speed of light in glass, the angle of refraction in glass and the critical angle
The index of refraction of glass is 1.5. Find the speed of light in glass, the angle of refraction in glass, if the light is incident from water at an angle of 40°, the critical angle of incidence... more
Find the angle of refraction of light incident on a water surface
Find the angle of refraction of light incident on a water surface at an angle of incidence of 52°. What is the speed of light in water?